Patent US1937858A successfully refreshed from Google Patents.
US1937858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making index strips
Assignee: Unisys Corp
•
Filing: 1931-02-09
•
Granted: 1933-12-05
•
Expires: 1951-02-09
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Taber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:24
CPC Classifications
B; B42; B42F; B42F21/00; B41; B41F; B41F15/00; B41F15/08; B41F15/0881; B42F17/00; B27; B27K; B27K2240/00; B27K2240/70; B27K3/00; B27K3/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-12-04 | 1937-06-05 | 1937-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-04 | 1941-06-05 | 1941-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-04 | 1945-06-05 | 1945-12-05 | $7700.00 | Window Closed / Lapsed |